The 32-bit and 64-bit Java 7 JDKs include only msvcr100.dll, 32-bit Java 6 includes only msvcr71.dll, and 64-bit Java 6 has neither!

Also, keep in mind that Java 7 is not certified yet for ANY* version of SQL Developer. The standard recommendation is to install the latest update in the Java 6 JDK code line (currently 1.6.0_45) and use that. Make sure to get the 32-bit version!

Regards,
Gary

Edited by: Gary Graham on Apr 24, 2013 1:15 PM
Corrected which Java downloads actually contain the msvcr71 and msvcr100 DLL versions. Sorry for messing it up the first time!